Jobber - A term sometimes used synonymously with Vendor. Jobber is more appropriately applied to a book vendor and is synonymous with Wholesaler.

Journal - A periodical, especially one containing scholarly articles and/or disseminating current information on research and development in a particular subject field. See also Periodical and Magazine. [ALA Glossary]

Journal gracing policy – See Gracing policy.

Journal monograph - A supplement to a journal devoted to a single topic and that allows for separate treatment as a monograph. See also Special issue.

Journal price sensitivity - A subjective measure of the importance a subscriber places on a journal. Price is not considered critical if a journal is deemed to have value in serving the subscriber's needs the journal is "price insensitive." A journal becomes "price sensitive" when its price is deemed to be beyond its importance to a subscriber.

Journal subscriber pattern - Among a journal's circulation, the ratio of personal to institutional subscribers. For commercial journals institutional subscribers predominate. For a society journal the circulation is comprised of many personal subscribers as well as institutional subscribers.

Journal subscription cycle - See Subscription period.

JPEG (Joint Photographic Experts Group) - A standardized image compression mechanism. JPEG stands for Joint Photographic Experts Group, the original name of the committee that wrote the standard. JPEG is designed for compressing either full-color or gray-scale images of natural, real-world scenes. It works well on photographs, naturalistic artwork, and similar material; not so well on lettering, simple cartoons, or line drawings. JPEG handles only still images, but there is a related standard called MPEG for motion pictures. See also MPEG. (JPEG Image Compression FAQ, part1: http://www.landfield.com/faqs/jpeg-faq/part1)